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-rw-r--r--gl/gethostname.c52
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1/* gethostname emulation for SysV and POSIX.1.
2
3 Copyright (C) 1992, 2003, 2006 Free Software Foundation, Inc.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
8 any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18
19/* David MacKenzie <djm@gnu.ai.mit.edu> */
20
21#include <config.h>
22
23#ifdef HAVE_UNAME
24# include <sys/utsname.h>
25#endif
26
27/* Put up to LEN chars of the host name into NAME.
28 Null terminate it if the name is shorter than LEN.
29 Return 0 if ok, -1 if error. */
30
31#include <stddef.h>
32
33int
34gethostname (char *name, size_t len)
35{
36#ifdef HAVE_UNAME
37 struct utsname uts;
38
39 if (uname (&uts) == -1)
40 return -1;
41 if (len > sizeof (uts.nodename))
42 {
43 /* More space than we need is available. */
44 name[sizeof (uts.nodename)] = '\0';
45 len = sizeof (uts.nodename);
46 }
47 strncpy (name, uts.nodename, len);
48#else
49 strcpy (name, ""); /* Hardcode your system name if you want. */
50#endif
51 return 0;
52}